TÜV Rheinland Onsite-Verified Manufacturer Yueqing, Zhejiang, China
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Power Supply Production Line

Single Output Switching Power Supply

High-efficiency enclosed AC-DC converters, LRS ultra-thin series, and industrial SMPS (15W to 500W) built with 100% full-load burn-in testing.

Engineered For Reliability

Industrial Grade Enclosed AC to DC SMPS

Engineered for CNC machinery, 3D printers, LED displays, CCTV security networks, and process control cabinets. Each unit provides short circuit, overload, and overvoltage protections.

Featured CE Certified
S-350-24 350W 24V 14.6A Ultra-Thin Enclosed Switching Power Supply
24V DC / 14.6A 350W Output 110V/220V Input

S-350-24 350W 24V 14.6A Ultra-Thin Enclosed SMPS

Ideal AC to DC power supply for high-demand CNC stepper motors, 3D printers, and industrial controllers requiring low ripple and robust thermal stability.

Min. Order: 10 pcs Inquire Now
High Demand CE Certified
15W to 500W Constant Voltage LED Driver & CCTV SMPS
5V / 12V / 24V 15W to 500W Metal Casing

15W–500W LED Driver & CCTV Single Output PSU

Versatile enclosed constant voltage switching power supply engineered for continuous-duty architectural LED installations, CCTV security, and automation machinery.

Min. Order: 1 pc Inquire Now
Heavy Duty CE Certified
100A 200A High Frequency Switch Rectifier Pulse Power Supply
100A / 200A High Frequency Electroplating

100A / 200A High-Frequency Switch Rectifier

High-power precision pulse rectifier designed for gold, silver, and copper electroplating, anodizing, and industrial surface treatment facilities.

Min. Order: 1 pc Inquire Now
Compact CE Certified
S-360-12 12V 30A 360W Switching Power Supply
12V DC / 30A 360W High Power Forced Cooling

S-360-12 12V 30A 360W Single Output SMPS

High-current 12V DC power supply designed for large CCTV setups, 3D printer hot beds, communications gear, and industrial servo motor drivers.

Min. Order: 1 pc Inquire Now
Universal CE Certified
S-360 Series 5V 12V 24V 48V 360W Single Output SMPS
5V/12V/24V/48V 360W Power High Efficiency

S-360 Series Multi-Voltage Single Output SMPS

Standard industrial footprint with active fan cooling, built-in EMI filtering, and reliable voltage adjustment trimming pot for sensitive instrumentation.

Min. Order: 15 pcs Inquire Now
Best Seller CE Certified
LRS-350 350W Ultra-Slim Switching Power Supply
12V 29A / 24V 14.6A 1U Low Profile 30mm High Surge Proof

LRS-350 Ultra-Slim 350W Industrial AC-DC PSU

Compact 30mm low-profile casing withstands 300VAC surge inputs for 5 seconds. Engineered specifically for space-constrained industrial equipment enclosures.

Min. Order: 1 pc Inquire Now
Miniature
LRS-35-12 Mini Size 12V Enclosed Power Supply
12V DC Output 35W Compact Size Free Air Convection

LRS-35-12 Mini Enclosed 12V 35W AC-DC Supply

Ultra-compact single output switching unit with fanless cooling, ideal for micro-controllers, IoT gateways, smart meters, and compact home automation.

Min. Order: 10 pcs Inquire Now
Automation CE Certified
LRS-50 50W Single Output Switching Power Supply 24V 2.2A
24V DC / 2.2A 50W Low Profile High Efficiency 89%

LRS-50-24 50W 24V 2.2A Enclosed Transformer

High-efficiency convection-cooled industrial power source complying with international safety standards, built for programmable relays, HMIs, and small sensors.

Min. Order: 1 pc Inquire Now
Universal CE Certified
LRS-75 Series 75W 30mm 1U Low Profile Switching Power Supply
12V / 24V / 48V 75W 1U 30mm No-load < 0.3W

LRS-75 Series 75W Low-Profile AC-DC Power Adapter

Extremely low no-load power consumption (<0.3W), high working temperature threshold up to 70°C, and 5G vibration resistance capability.

Min. Order: 1 pc Inquire Now
Industrial CE Certified
LRS-100 Series Switching Power Supply Single Output SMPS
3.3V to 48V DC 100W Output Full Range Input

LRS-100 Series 100W Single Output SMPS

Standardized compact footprint supporting universal 85–264VAC input. Tested against harsh commercial and industrial voltage fluctuations.

Min. Order: 1 pc Inquire Now
Reliable CE Certified
150W 24V 6.5A SMPS Switching Power Supply LRS-150
24V DC / 6.5A 150W Real Output Overload Protected

LRS-150 150W 24V 6.5A Constant Voltage SMPS

Designed for industrial automation drives, advertising lightboxes, and telecommunications units. Features auto-recovery hiccup mode for overcurrent.

Min. Order: 15 pcs Inquire Now
Heavy Duty CE Certified
LRS-200-24 Switching Power Supply 110V 220V AC Single Output SMPS 200W 24V
24V DC / 8.8A 200W Continuous 110V/220V AC In

LRS-200-24 200W 24V Industrial CCTV & Control SMPS

Low-noise enclosed power supply with aluminum chassis cooling, providing dependable 24V DC power for surveillance arrays and PLC control racks.

Min. Order: 1 pc Inquire Now
Audited Manufacturing Plant

Verified Production Facilities & Testing Processes

Yueqing Keldan Technology Co., Ltd. operates standardized in-house manufacturing workshops verified onsite by TÜV Rheinland. We maintain strict process controls from SMT insertion to full-load aging.

SMT mounter equipment
SMT Mounter
Reflow soldering line
Reflow Soldering
AOI optical inspection machine
AOI Optical Inspection
Assemble line
Assembly Line
Cutting pieces
Cutting Pieces
Welding process
Manual Welding
Debugging equipment
Debugging & Calibration
Aging test rack
Aging (Burn-in) Test
Aging testing system
Aging Testing System
Production Process 1
Production Process 1
Production Process 2
Production Process 2
Assembly & Final Testing
Workstation Assembly
Aging test bay
Aging Test Bay
Main workshop floor
Manufacturing Floor
Finished goods warehouse
Finished Warehouse
Technical FAQ

Frequently Asked Questions by OEM & Industrial Buyers

What quality control gates are used during power supply manufacturing?
Every single output switching power supply passes through an 8-stage verification pipeline: on-site incoming component screening (capacitors, diodes, MOSFETs), high-speed SMT placement, reflow soldering, automated optical inspection (AOI), manual parameter debugging, 100% full-load burn-in aging test, final electrical safety inspection, and pre-shipment cosmetic and packaging audits.
Can Yueqing Keldan Technology Co., Ltd. provide custom voltages and private labeling?
Yes. We specialize in design-based and sample-based OEM/ODM projects. Our engineering department can adapt standard topologies to deliver custom output ratings (e.g., 36V, 48V, or dual rails), tailor the enclosure profile (1U low-profile or waterproof formats), configure terminal block styles, and apply customer-branded silkscreens and custom packaging.
How does the LRS series differ from the conventional S series enclosed power supply?
The LRS series offers a compact 30mm low-profile 1U enclosure, higher operating efficiency (up to 89–91%), extremely low no-load power consumption (<0.3W), and heightened immunity to 300VAC input surges for 5 seconds. The S series provides a robust, field-proven heavy-duty metal chassis that is cost-effective for general industrial equipment and replacement retrofits.
What is the typical lead time and MOQ for sample and wholesale orders?
Standard catalog models are available for fast dispatch with minimum order quantities starting from 1 to 10 pieces. Customized production runs typically ship within 10 to 25 business days depending on specific component requirements and batch quantities.

Need a Custom Output Voltage or Sample Evaluation?

Contact the engineering and sales team at Yueqing Keldan Technology Co., Ltd. for prompt technical support, formal quotes, and full product datasheets.

[email protected]
Inquire Now